Team:KULeuven/Model/Output

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Pictogram output.png

Contents

Output

Position in the system

The output system is one of three modules directly linked to the input. The output system is a simple gene regulation, of which transcription is activated by tetR. The output signal is GFP (green fluorescent protein).

In the applied project of dealing with Crohn's disease this would be replaced by the drug necessary to cure the local inflammation. The drug concentration would be proportional to the amount of local inflammation sensed.

Describing the system

see also: Project:Output

Output BioBrick.jpg

ODE's

Parameters

Parameter values (Output)
Name Value Comments Reference
Degradation Rates
dGFP dLVA = 2.814E-4 s-1 LVA-tag reduces lifetime to 40 minutes [http://parts.mit.edu/igem07/index.php/ETHZ/Parameters link]
dmRNA_GFP 0.0023 s-1 [http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=124983&blobtype=pdf link]
Transcription Rates
TetR_var_transcr_rate p(TetR) dependent (GFP) between 5E-5 and 0.0125 s-1 ~ [aTc]
Translation Rates
kB0032 0.167 s-1 translation rate for B0032 RBS (0.3 relative efficiency)

Models

CellDesigner (SBML file)

Output


Matlab (SBML file)

Output Matlab.jpg


Simulations

Several simulations were conducted, the following two show the transient respons and eventual saturation of the output system to a low and a high step signal as input, respectively. We see that there is a great distinction in the number of CFP molecules between the two input signals.

Sim output 1.png
Sim output 2.png

Next figure shows the switching behaviour of the output system to an light signal turning off and on:

Sim output 3.png

Sensitivity Analysis

Sens output2.png